EP0245880A3 - Variable magnification electrostatic copying apparatus - Google Patents

Variable magnification electrostatic copying apparatus Download PDF

Info

Publication number
EP0245880A3
EP0245880A3 EP87108010A EP87108010A EP0245880A3 EP 0245880 A3 EP0245880 A3 EP 0245880A3 EP 87108010 A EP87108010 A EP 87108010A EP 87108010 A EP87108010 A EP 87108010A EP 0245880 A3 EP0245880 A3 EP 0245880A3
Authority
EP
European Patent Office
Prior art keywords
variable magnification
copying apparatus
electrostatic copying
magnification electrostatic
variable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP87108010A
Other versions
EP0245880A2 (en
EP0245880B1 (en
Inventor
Nobuhiko Kozuka
Hiromi Sakata
Atsushi Kano
Shigeo Koyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Mita Industrial Co Ltd
Original Assignee
Mita Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mita Industrial Co Ltd filed Critical Mita Industrial Co Ltd
Publication of EP0245880A2 publication Critical patent/EP0245880A2/en
Publication of EP0245880A3 publication Critical patent/EP0245880A3/en
Application granted granted Critical
Publication of EP0245880B1 publication Critical patent/EP0245880B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/041—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with variable magnification
    • G03G15/0415—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with variable magnification and means for controlling illumination or exposure
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/522—Projection optics
    • G03B27/525—Projection optics for slit exposure
    • G03B27/526—Projection optics for slit exposure in which the projection optics move
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/041—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with variable magnification

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)
EP87108010A 1982-11-30 1983-11-25 Variable magnification electrostatic copying apparatus Expired - Lifetime EP0245880B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP57208488A JPS5999429A (en) 1982-11-30 1982-11-30 Electrostatic copying machine with variable power
JP208488/82 1982-11-30

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP83111818.7 Division 1983-11-25

Publications (3)

Publication Number Publication Date
EP0245880A2 EP0245880A2 (en) 1987-11-19
EP0245880A3 true EP0245880A3 (en) 1988-02-10
EP0245880B1 EP0245880B1 (en) 1993-07-07

Family

ID=16556989

Family Applications (2)

Application Number Title Priority Date Filing Date
EP87108010A Expired - Lifetime EP0245880B1 (en) 1982-11-30 1983-11-25 Variable magnification electrostatic copying apparatus
EP83111818A Expired EP0110345B1 (en) 1982-11-30 1983-11-25 Variable magnification electrostatic copying apparatus

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP83111818A Expired EP0110345B1 (en) 1982-11-30 1983-11-25 Variable magnification electrostatic copying apparatus

Country Status (4)

Country Link
US (1) US4582418A (en)
EP (2) EP0245880B1 (en)
JP (1) JPS5999429A (en)
DE (2) DE3380881D1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4740810A (en) * 1985-07-09 1988-04-26 Minolta Camera Kabushiki Kaisha Copying apparatus
US4819029A (en) * 1986-01-29 1989-04-04 Minolta Camera Kabushiki Kaisha Copying machine capable of producing a copy with a filing margin
JPS62192763A (en) * 1986-02-19 1987-08-24 Ricoh Co Ltd Copying device
JPS6321641A (en) * 1986-07-15 1988-01-29 Ricoh Co Ltd Correcting device for illuminance irregularity of copying machine
JP2582411B2 (en) * 1987-07-30 1997-02-19 三田工業株式会社 Lens control method in image forming apparatus
JPH01142541A (en) * 1987-11-27 1989-06-05 Brother Ind Ltd Image forming device
US5012278A (en) * 1988-06-25 1991-04-30 Mita Industrial Co., Ltd. Document density detector apparatus
JPH0766151B2 (en) * 1989-12-18 1995-07-19 シャープ株式会社 Optical zoom mechanism of electrophotographic copying machine
JP2552390B2 (en) * 1990-10-29 1996-11-13 シャープ株式会社 Optical unit
JP3483381B2 (en) * 1996-01-06 2004-01-06 キヤノン株式会社 Image forming apparatus and magnification correction method using the same
JP3384674B2 (en) * 1996-03-13 2003-03-10 京セラミタ株式会社 Initial operation control device of image forming apparatus
US8259366B2 (en) * 2006-07-28 2012-09-04 Canon Kabushiki Kaisha Image reading apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897148A (en) * 1973-11-29 1975-07-29 Ibm Optical scanning system
GB1444099A (en) * 1973-06-25 1976-07-28 Oce Van Der Grinten Nv Electrophotographic copier

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3476478A (en) * 1967-01-03 1969-11-04 Xerox Corp Apparatus for changing the magnification of a photocopier without changing the conjugate length of the optical system
JPS4918539U (en) * 1972-05-19 1974-02-16
US4158497A (en) * 1976-08-31 1979-06-19 Ricoh Co., Ltd. Copying apparatus
GB1525218A (en) * 1976-09-07 1978-09-20 Ibm Electrophotographic copying machine
DE2949338C2 (en) * 1978-12-08 1986-06-19 Canon K.K., Tokio/Tokyo Device for changing the copy scale
JPS5639565A (en) * 1979-09-10 1981-04-15 Asahi Optical Co Ltd Variable-magnification copying machine
DE3163692D1 (en) * 1980-01-07 1984-06-28 Xerox Corp Method and apparatus for compensating for illumination defects in an optical system
JPS568168A (en) * 1980-02-25 1981-01-27 Minolta Camera Co Ltd Position adjusting device of optical system in copying machine
JPS56125773A (en) * 1980-03-06 1981-10-02 Canon Inc Light quantity corrector
US4397544A (en) * 1980-08-31 1983-08-09 Fuji Photo Optical Co., Ltd. Optical apparatus for changing magnification or reduction rates
JPS57188168A (en) * 1981-05-14 1982-11-19 Fujitsu Ltd Simple manager secretary telephone system
JPS57188068A (en) * 1981-05-15 1982-11-18 Ricoh Co Ltd Variable magnification optical system for copying machine
JPS5852659A (en) * 1981-09-24 1983-03-28 Asahi Optical Co Ltd Copying machine with image enlarging and contracting function capable of continuous variable magnification
JPS5895358A (en) * 1981-11-30 1983-06-06 Mita Ind Co Ltd Electrostatic copying method and copying machine
JPS58182627A (en) * 1982-04-20 1983-10-25 Mita Ind Co Ltd Electrostatic copying machine
US4441805A (en) * 1982-06-28 1984-04-10 International Business Machines Corporation Means for positioning optical components for a variable magnification/reduction copier optics system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1444099A (en) * 1973-06-25 1976-07-28 Oce Van Der Grinten Nv Electrophotographic copier
US3897148A (en) * 1973-11-29 1975-07-29 Ibm Optical scanning system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 5, no. 202 (P-95)[874], 22nd December 1981; & JP-A-56 125 773 (CANON K.K.) 02-10-1981 *

Also Published As

Publication number Publication date
EP0110345A3 (en) 1985-05-15
DE3380881D1 (en) 1989-12-28
JPH0473571B2 (en) 1992-11-24
EP0110345A2 (en) 1984-06-13
JPS5999429A (en) 1984-06-08
DE3382703T2 (en) 1994-03-03
US4582418A (en) 1986-04-15
EP0245880A2 (en) 1987-11-19
EP0245880B1 (en) 1993-07-07
DE3382703D1 (en) 1993-08-12
EP0110345B1 (en) 1989-11-23

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